Canning jar hourglass



FIG. 1 is a perspective view of a canning jar hourglass showing my new design;

FIG. 2 is a front elevational view thereof, the rear and side elevational views being identical thereto; and,

FIG. 3 is a top plan view, the bottom plan view being a mirror image thereof.

The “sand” depicted by broken lines in FIGS. 1 and 2 has been shown to illustrate environment that forms no part of the claimed design. 

CLAIM The ornamental design for a canning jar hourglass, as shown and described. 